Been reading a little bit about igbinary and I am wondering if anyone is using it. Any problems ?
I installed the extension on my test machine running PHP 5.4.21 with the following settings:
extension=igbinary.so
igbinary.compact_strings=on
session.serialize_handler=igbinary
I tested this using MoodleHQ Performance comparison script and it looks like the sessionsize is reduced almost 50% with little change in latency although server load did go up a bit.